Cincinnati Police Chief Eliot Isaac said Omar Santa-Perez, 29, walked into the Downtown building dressed in business attire and holding a 9 mm handgun when he opened fire at 9:06 a.m.

Isaac said Santa-Perez fired 35 rounds in four minutes and 28 seconds. The video shows several members of the public and employees of the building running and hiding for cover as the shooter paced back and forth, firing the weapon in multiple directions.

Officers quickly responded to the building and fired about 11 rounds through the building's plate glass entrance, killing Santa-Perez almost instantly.

Isaac said the shooter was carrying more than 200 rounds of ammunition in a briefcase.